Method for reducing artifacts in a spatial measurement
View Patent ↗A method for artifact reduction in sonomicrometer obtained intracranial pressure measurements generally comprises isolating a component of a sonomicrometer waveform attributable solely to changes in intracranial volume by using a neural network or other nonlinear engine to extract a heartbeat component from the sonomicrometer output. Because the heartbeat is so characteristic, no actual measurement of the heartbeat as the forcing function is required to isolate the resulting changes in distance from the artifact induced changes in distance. The neural network then be utilized to directly map measured changes in skull distance over time to changes in intracranial pressure over a volume change, the inverse of compliance. The method is generally extendable to use with other volumetric based measurement techniques.
1. A method of artifact reduction in intracranial pressure measurements comprising isolating the change in distance attributable to changes in intracranial volume by extracting a heartbeat component from the measurements utilizing a neural network to map measured changes in skull distance over time.
2. The method according to claim 1 wherein changes in intracranial pressure over time are compared to changes in skull distance.
3. A method of artifact reduction in a spatial measurement of a cranium, comprising the steps of:
isolating a first component of the spatial measurement from a second, artifact-induced component of the spatial measurement by extracting components of the spatial measurement that correspond to a heart beat waveform; and
mapping measured changes in skull distance over time to changes in intracranial pressure over a volume change.
4. The method of claim 3 , wherein a neural network is used to isolate the first component from the second, artifact-induced component.